<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>created</title>
</head>
<body>
    <div id="app">
        {{hello}}
    </div>
</body>
<script src="../node_modules/vue/dist/vue.js"></script>
<script>
    let vm = new Vue({
        el:"#app",
        data:{
            hello:''
        },
      /*  created() {
            this.hello="hello,world";
        }*/
      mounted() {
          this.hello="hello"
      }
    })
</script>
</html>